<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @version    $Id: BaseUrl.php 16971 2009-07-22 18:05:45Z mikaelkael $
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** @see Zend_View_Helper_Abstract */
require_once 'Zend/View/Helper/Abstract.php';

/**
 * Helper for retrieving the BaseUrl
 *
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_View_Helper_BaseUrl extends Zend_View_Helper_Abstract
{
	/**
	 * BaseUrl
	 *
	 * @var string
	 */
	protected $_baseUrl;

	/**
	 * Returns site's base url, or file with base url prepended
	 *
	 * $file is appended to the base url for simplicity
	 *
	 * @param  string|null $file
	 * @return string
	 */
	public function baseUrl($file = null)
	{
		// Get baseUrl
		$baseUrl = $this->getBaseUrl();

		// Remove trailing slashes
		if (null !== $file) {
			$file = '/' . ltrim($file, '/\\');
		}

		return $baseUrl . $file;
	}

	/**
	 * Set BaseUrl
	 *
	 * @param  string $base
	 * @return Zend_View_Helper_BaseUrl
	 */
	public function setBaseUrl($base)
	{
		$this->_baseUrl = rtrim($base, '/\\');
		return $this;
	}

	/**
	 * Get BaseUrl
	 *
	 * @return string
	 */
	public function getBaseUrl()
	{
		if ($this->_baseUrl === null) {
			/** @see Zend_Controller_Front */
			require_once 'Zend/Controller/Front.php';
			$baseUrl = Zend_Controller_Front::getInstance()->getBaseUrl();

			// Remove scriptname, eg. index.php from baseUrl
			$baseUrl = $this->_removeScriptName($baseUrl);

			$this->setBaseUrl($baseUrl);
		}

		return $this->_baseUrl;
	}

	/**
	 * Remove Script filename from baseurl
	 *
	 * @param  string $url
	 * @return string
	 */
	protected function _removeScriptName($url)
	{
		if (!isset($_SERVER['SCRIPT_NAME'])) {
			// We can't do much now can we? (Well, we could parse out by ".")
			return $url;
		}

		if (($pos = strripos($url, basename($_SERVER['SCRIPT_NAME']))) !== false) {
			$url = substr($url, 0, $pos);
		}

		return $url;
	}
}
